OP#792 initial commit after fork

internal/s3select/sql/jsonpath_test.go

@@ -0,0 +1,99 @@
+// Copyright (c) 2015-2021 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package sql
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+
+	"github.com/alecthomas/participle"
+	"github.com/minio/minio/internal/s3select/jstream"
+)
+
+func getJSONStructs(b []byte) ([]any, error) {
+	dec := jstream.NewDecoder(bytes.NewBuffer(b), 0).ObjectAsKVS().MaxDepth(100)
+	var result []any
+	for parsedVal := range dec.Stream() {
+		result = append(result, parsedVal.Value)
+	}
+	if err := dec.Err(); err != nil {
+		return nil, err
+	}
+	return result, nil
+}
+
+func TestJsonpathEval(t *testing.T) {
+	f, err := os.Open(filepath.Join("jsondata", "books.json"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	b, err := io.ReadAll(f)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p := participle.MustBuild(
+		&JSONPath{},
+		participle.Lexer(sqlLexer),
+		participle.CaseInsensitive("Keyword"),
+	)
+	cases := []struct {
+		str string
+		res []any
+	}{
+		{"s.title", []any{"Murder on the Orient Express", "The Robots of Dawn", "Pigs Have Wings"}},
+		{"s.authorInfo.yearRange", []any{[]any{1890.0, 1976.0}, []any{1920.0, 1992.0}, []any{1881.0, 1975.0}}},
+		{"s.authorInfo.name", []any{"Agatha Christie", "Isaac Asimov", "P. G. Wodehouse"}},
+		{"s.authorInfo.yearRange[0]", []any{1890.0, 1920.0, 1881.0}},
+		{"s.publicationHistory[0].pages", []any{256.0, 336.0, Missing{}}},
+	}
+	for i, tc := range cases {
+		t.Run(tc.str, func(t *testing.T) {
+			jp := JSONPath{}
+			err := p.ParseString(tc.str, &jp)
+			// fmt.Println(jp)
+			if err != nil {
+				t.Fatalf("parse failed!: %d %v %s", i, err, tc)
+			}
+
+			// Read only the first json object from the file
+			recs, err := getJSONStructs(b)
+			if err != nil || len(recs) != 3 {
+				t.Fatalf("%v or length was not 3", err)
+			}
+
+			for j, rec := range recs {
+				// fmt.Println(rec)
+				r, _, err := jsonpathEval(jp.PathExpr, rec)
+				if err != nil {
+					t.Errorf("Error: %d %d %v", i, j, err)
+				}
+				if !reflect.DeepEqual(r, tc.res[j]) {
+					fmt.Printf("%#v (%v) != %v (%v)\n", r, reflect.TypeOf(r), tc.res[j], reflect.TypeOf(tc.res[j]))
+					t.Errorf("case: %d %d failed", i, j)
+				}
+			}
+		})
+	}
+}